Safety cranking device



A. I. SANDBU.

SAFETY CRANKING DEVICE.

APPLICATION FILED MAR.25. 1919.

Patented Mar. 9,1920;

2 SHEETS-SHEET 2.

WITNESS: I IN V EN TOR.

v A osemme, or 3001: istaismafinvois, 9

V 7}? Q I'; Teaser; cnaivxmq nnvroni Be i known that I,'-A1\*T0N I. Sennno, a

T citiz'en: of the United States, residing at RockI Isla'nd, in theicounty of Rock Islandand State of'Illinois, have invented-certain I'The present invention relates to a safety device tor fuse with cranks employed for starting the internal combustion engines-of automobiles, and isparticularly an improvement over thesafety cranking device disfor. engine stopping-cranks, and so con .structed andoperable in order that when the engine back fires, this ,will automatically closed in 'm-y PatentNo. 1,288,443, granted 'Dec'."17, 1918.-

The invention has for its object the pro-- vision ot'a' novel and improved attachment disconnect the crank" from the'engine crank shaft, thereby avoiding injury to'the 0 erator, as notinfrequently happens, with t e use of the ordinary crank.

' As almore spe'cific object, the invention aims to improvefthe devicedisclosed in said patent, to enhance the utility and efiiciency 1 of the appliancejf With the foregoing and other objects in view-whichwill be apparent as thefdescripin. broken away,

and ring showing the ratchet between them.

tion "proceedsythe invention resides in the construction and arrangement of parts hereinafter described" and claimed, it being underst'ood'thatlchanges can be madewithin the scope of Whatis claimed without departing from the spiritof theinvention.

5 The invention islillu'strated in the-accom- Figure 1 1s a front view of the device as applied. a' portion of the starting crank be:

' Fig. '2"s a. ,crosssection through the drum Fig.3 is a side elevation of the device.

' {Fig.4 isa' verticalfdiametricalsection.

"'LFig. f5lS a plan viewof the yoke for con trollingthemoveinent of thering.

In the drawings'there is shown the starting emnki of an. automobile enorine,-'which 'is'mounted' for rotarv' and, sliding move-' ments in a bearing' Q'tbat is secured onjthe t'thereoni The' rearend of the crank "lfhits' a ratchet clutch member tomove rear V wardly and engage the clutch pin 6 ofthe engine crank shaft 7 as, usual, so that by shifting the crank rearwardly and turningit, the engine can .be started. However, -1n-' the event that the engine back'fires, thiswill quently resulted in injuries and annoyances. The safety device includes a drum -8 de= signed to be secured on the shaft or-spindle.

drum 8 may be provided with difierent means for attachinglit to the starting crank, according tothe construction of said crank.

spinthe crank 1 rearwardly, which has fre-i n V Patented Mar,9,1920. I lppl ication filedltiarch25,,1919. Seria1No. 284,898., I a

7 portion of the starting crankl, and said As shown, thedrum 8 has a central opening 9-through which the crank '1 projects, and

a clamping member 10 shaped to fit the bend of' thecrank, is secured to theidru'm 8 by means of screws "10 or the likeytheteby securing the drum 'firmly to the crank. to

rotate therewith, although other means can beiemployed toisecure. the drum inlplace it as disclosed in said patent. 1 A disk'or plate 12 isisecured to the forward sideofzthe drum 8. between the clamping member: 10'

andsaid drum, and-mayyform part of the clamp. which embraces thecranln the" edge eryof thedrum. as'seen in Fig, 4;

A ring :15 surrounds thedrum 8 and} is of'said plate projecting bevondthe periph mounted .for limited" oscillatory movement,

while the drum is rotatable withinsaid ring withthe crank. The forward edge of the ring 13 has atrabbet'14 receiving the-edge 'of the plate 12.'while the rearedge ofthe ring 13 has aninwardlyfextending annular flange- 15 fitting rotatablv on the drum 8 against the shoulder ;16 thereof. In order to retain the ring13 on the drum. a split resilient ring'l 'f can-be snapped intoand an annular-groove"18win the drum behind in cas e of back firing, so that this willresult in the-disengagement of the clutch member 5 from the pin 6; as will hereinaftermore fully'appean' This ratchet includes ratchet recesses-19 intheointerior ofjthe ring-'13 and similar recesses2O int-he-periphery of l with: the-drumywithout any 'lost motion or the drum, and rollers :21 constituting dogs.

or pawls disposed in the-recessesl9i at, that side of the drum and ring wheresaid rollers will drop by gravity away from thefleepep ends of the recesses so as to wedge between the inclinedor cam Walls of said recesses of the drum and'ring as seen in Fig; 2. E-Thi's side of the drum and a. ring isitermed the gravity side, because the rollers fall by gravitywto bind between'th-e drum-landri-ngand;

the recesses 20, are :smaller than th'erecesses 719*; and in irregular arrangement relatively 1 1 thereto, sonthati whenever-the; drum; S re verses, one of the: r0llers=:.21 will berin posi; tionto bind instantly. between i the drum and ring. causing the ring-lfixto rotate reversely V loose-play.'v The-rear. ends of-the rollers 21 abut the flange-l 15J't-and their forward en d abut the plate l2."

lnzordervto control the movementof thel ring: 13;, said: ring is vprovided at opposite sides:with outstanding-x studs l 22 on which rollers are mounted for rotation, and an arcuate depending yoke' 24a is hung below thev axisa. and is 1' provided? at its .ends with outstanding aperture ears125' to engage over the bolts 3c and be clamped in place: by the nuts" 4; thus enabling said yoke to be easily applied; 7 This :yoke has abutments 26.

against which therollers' 23 1 normally bear rearwardlyiwhen the crank is in normal position; andsaidyoke has inclined-cams 27 extending] 'helically rearward from saidabutments; Thus, 'when the crank 1 is turned-fund moved rearwardly, the rollers 23 can roll! from the abutment 26 1 along the cams 27 to ,bring the clutch member 5wint0a engagement with the pint, theiring15 beingwshifted withthe drum: 8 and crank'l during such movement. Inorder to limit the oscillatory: movement of-the. ring:.13, the lower-portionof the yoke 24 has-a forfunction of the present device automatically disconnect that starting crank from the" engine shaft in theevent that the engineba ck fires. Thus if this occurs, thererotatingthe drum 8 reversely with the crankS, one of the rollers 21 willinstantly bindhet'wee'n the drum and ring '15 {thereby rotating said ring back with the drum and the rollers23 in contacting with the cam 27 will force the ring l5 forwardly=by-cam" possible ,injuryto "the operator Having thus described thetzinvention, what'- is claimed; as; new is 1 1. A safety I cranking, deviceincludinga;

drum; adapted l te -beau secured on-ran engine starting crank, a ring-surrounding the drum,

meansfor, shiftingsaid ringtand drumqto d sconnect: sa d crank from an; englne shaft:

when-said ring rotates reversely the interior;

of the ringand periphery of theidrum have ing' ratchet recesses of diflerent-sizes-and lrregular arrangement; and rollers in therecesses-fof the;;ring;toj :lrop by-gravity away from the deepenen-dsoisaidrrecessesof the ring.- and? drum to; bind between 1111815111- clinedf' walls thereof:,ji a v2.. A; safety cranking: device including {a drum adapted to: he -secured on an engine-- starting ClELlllQ a ringisurrounding the drum, a ratchet means between said drum and ring, and a yoke having "portionswat its ends for attachment to an-- au tOj1I1Q ile frame and having cams.at;its endssaid; ring; haying 105 portions to'engage the cams tO-E shiftsaid IlllgyfOlWflltllY when it;is-;rotatedreverselywlth the drum, said ring and yolre having m ns: f r limitingpthe c l tion: f he wardly"extendingfloop 28 projecting under the: ring 15; and said E ring has a depending lugw29, working within said-loop, thereby only-permittingthe: ring; to,.turn thed-istimes between the ends of the loop the -lug29j-will contact-therewith; The. yoke 24=gcan: be, providedwith; apertured ears or lllgS;30%2tt: the oppositeend's of the loop 28 for the suspension of alicense tag; 31 as: seenin Fig." 1,- thus providing an: additiOnal advantage for said yoke.-

In operation, when thecrank 1 is shifted rearwardly; the ring? 13 being turned slightly so that; the; rollers 23; canemove rearwardly along-the cam 27', the 5 drum and ring will 5 be; shifted. rearward-1y, and; when the; clutch member; 5 engages the pin;- 6 the crankican be; turned; in the; usual way for start-ingtheengine. 'When the; crank is re: leased,- it; is-movedfonwardly out ofengage ment with" the, enginercrank; shaft by-the 28-when spring; pmyided imrczthat, purpose- The I A afety cranking-1 der eevembQ y nse-a drumdapted-i0; be ecur d-01 s g ne ta -ing ra k,a-ring u rou ng hezdru n 2111611 ift blf th r w th, tehemnans-z be: w eni a d a f miandx ing otate heiri reversely withthe drnm, and; an arcuate yoke havingyportions at its ends for atta'chmen-t to an zuutornobilei frame j and having cams at said ends and a loop; betwee n its ends, saidyring'having-arlug working-within said loop to limit the oscillation of the ring, .and having opposite rollersto; engage said cams. and shift theringand drum forwardly-when the r mg ls rotatedreversely;

4:. A safety cran-kingmlevice; embodying a drum adapted to.fbe;secured on an engine start ng crank, a rmgsurroundmg thedrum;

ratchet means between said ring and; drum to rotate the ring -are versely, with the drum,

anda, yoke; having; means y its ends-for attachment tea enxiant mobilm framen sa d,

ring and yoke having cooperating means for shifting the ring and drum forwardly when the rin is rotated reversely, said yoke having portions for supporting a license ta 5. A safety cranking device embodying a drum adapted to besecured on an engine starting crank, a plate secured to the front side of the drum, a ring surrounding the drum and havingcits forward edge fitting the edge of said plate, said ring having an 1 inturned annular flange at its rear edge mounted rotatably on the drum, means on name to this specification in the presence of 20 two subscribing witnesses.

ANTON I. SANDBOQ Witnesses:

CARL J. MficKE, CARL RfiHL. 

